Characterising sources of PM(2·5) exposure for school children with asthma: a personal exposure study across six cities in sub-Saharan Africa.

Lim S, Said B, Zurba L, Mosler G, Addo-Yobo E, Adeyeye OO, Arhin B, Evangelopoulos D, Fapohunda VT, Fortune F, Griffiths CJ, Hlophe S, Kasekete M, Lowther S, Masekela R, Mkutumula E, Mmbaga BT, Mujuru HA, Nantanda R, Mzati Nkhalamba L, Ngocho JS, Ojo OT, Owusu SK, Shaibu S, Ticklay I, Grigg J, Barratt B,